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TYPE OF PROBLEM
Motor runs and pump strokes,
but output is low or there is no
output.
Motor runs but pump does not
stroke.
Motor is hot and runs
intermittently.
NOTE 1: Thaw the sprayer if water or water-based paint has frozen in it, by placing it in a warm area. Do not try to
start the sprayer until it has thawed completely. If paint hardened (dried) in the sprayer, replace the pump packings.
See page 15.
Troubleshooting
WHAT TO CHECK
If check is OK, go to next check
Check extension cord size and length.
Check paint supply.
Check for clogged intake strainer.
Check for loose suction tube or loose fittings.
Check for worn spray tip.
Check motor brushes; check for loose leads
and terminals, minimum 1/2" brush length,
broken or misaligned springs, or brushes
binding in holders. See page 14.
Check motor armature for shorts by using an
armature tester (growler).
Check to see if pump continues to stroke
when gun trigger is released. With pump on
and primed, trigger gun momentarily, then
release and engage safety latch. Relieve
pressure, turn off and unplug sprayer.
Check to see if intake valve ball and piston
ball are seating properly.
Check for leaking around throat packing nut
which may indicated worn or damaged
packings.
Check displacement pump connecting rod
pin (20). See page 19.
Check for frozen or hardened paint in the
pump (39).
Be sure crank in drive housing rotates; plug
in sprayer and turn on briefly to check. Turn
off and unplug sprayer.
Determine if sprayer was operated at high
pressure with small tips, which causes low
motor RPM and excessive heat build up.
Be sure ambient temperature where sprayer
is located is no more than 90 F and sprayer
is not located in direct sun.
Determine in sprayer was turned on,
pressurized, but not operating for long
periods of time.
WHAT TO DO
When check is not OK refer to this column
Replace cord with a larger size, grounding
type extension cord.
Refill and reprime pump.
Remove and clean strainer and reinstall.
Tighten; use thread sealant or sealing tape
on threads, if necessary.
Follow Pressure Relief Procedure
Warning, then replace tip. See your
separate gun or tip manual.
Replace parts as needed. See page 14.
Replace motor. See page 21.
Service pump. See page 15.
Remove intake valve and clean. Check balls
and seats for nicks; replace if necessary.
See page 16. Strain paint before using to
remove particles that could clog the pump.
Replace packings. See page 15. Also check
piston valve seat for hardened paint or nicks
and replace if necessary. Tighten the
packing nut/wetcup.
Replace pin, if missing. Be sure retainer
spring (35) is fully in groove all around
connecting rod. See Fig. 38, page 19.
Thaw. See NOTE 1. Plug in sprayer and turn
on. Slowly increase pressure setting to see if
motor starts.
Check drive housing assembly for damage
and replace if necessary. See page 23.
Decrease pressure setting or increase tip
size.
Move sprayer to shaded, cooler area, if
possible.
Turn off sprayer whenever you stop spraying
for a while and relieve fluid pressure.
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